Pictures and Movies

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Two dimensional Melting

Snap Shots

Red particles are disordered and blue ones are oredred.

Fluid Critical Sodid

Movies


Milk-crown

Simulating of Milk-crown with Lennard-Jones particles.

Milk-crown [mpg, 2.9MB]

Collision/Destruction

Two dimensional Collision

Collision of two Lennard-Jones solids. Two-dimensional Lennard-Jones system. MPI parallelized (4 PU). Different colors denote different processes..

Three dimensional Collision

Collision of two Lennard-Jones crystals (FCC). Three-dimensional Lennard-Jones system.

Collision to wall

Collision of Droplets

Collision of two Lennard-Jones liquid droplets. 107294 particles, 250000 steps with the time step 0.002.

Collision of two Lennard-Jones droplets. 33454 particles, 16000 steps with the time step 0.005. Images are made with POV-Ray.


Bursting Droplets

Bursting of droplets. This work is inspired by Edward Horsford's artworks.

Low Pressure

187634 particles, 8000 steps with the time step 0.005. Truncation length is 2.5. Initial density and temperature of droplet are 0.7 and 0.9, respecrively. The radius of the droplet is 40 and the system size is 400 in LJ units.

High Pressure

268307 particles, 8000 steps with the time step 0.005. Truncation length is 2.5. Initial density and temperature of droplet are 1.0 and 1.5, respecrively. The radius of the droplet is 40 and the system size is 400 in LJ units.


Condensation

The result of molecular dynamics simulations with 300,000 Lennard-Jones particles. At first, all particles are heated enough to be gas. After thermalization, temperature is decreased quickly below the boiling point, and then, hot steam is condensed to liquid.

  • Movie [mpg, 1.4MB]
  • Movie [mpg, 1.4MB]


    Bubble Nucleation

    Single Bubble Nucleation

    The result of molecular dynamics simulations with 1,468,006 Lennard-Jones particles. At first, the pure-liquid phase is achieved. After thermalization, the pressure is reduced below the boiling point, and then, a bubble starts to grow after some waiting time.

  • Movie (Density Threshold 0.2) [mpg, 3.1MB]

  • Movie (Density Threshold 0.4) [mpg, 3.1MB]

    While time evolutions of the two movies are identical, different values of density threshold are used to indentify the gas state.

  • Larger System (N=11,744,051) [mpg, 1.0MB]

    Multi Bubble Nucleation

    The result of molecular dynamics simulations with 9,663,597 Lennard-Jones particles. At first, the pure-liquid phase is achieved. After thermalization, the pressure is reduced below the boiling point. The system is in the spinodal region after the depressurization, and therefore, multi-bubble nucleation is observed.

  • Large system (N=11,744,051) [mpg, 1.5MB]

    Ostwald Ripening

    After multi-bubble nucleation, the ostwald ripening happens because of the interaction between bubbles, and finally, the single bubble remains.

    Result 1

     Simulation Details: Time = 1840 in LJ unit. L=128, Initial density = 0.7, Initial Temperature = 0.9. 1,468,006 particles. Cutoff 3.0 sigma. Visualized with ParaView.

  • Large System (N=1468006) [mpg, 1.1MB]
  • Small System [mpg, 1.1MB]

    Result 2

     Simulation Details: System Size = 320*320*320, Initial Density 0.7 (N = 22,937,600), Temperature 0.9, TimeStep 0.005, Cutoff 3.0: After 10000-steps thermalization, system is expanded by 1.025. Put snapshots every 1000 steps, total 619 frames (t = 3095 in LJ Units). Flat mpi, 1024 processes at ISSP System B (SGI Altix Ace 8400EX). Visualized with ParaView.

  • [mpg, 3.7 MB]

    Result 3

    The same conditions as Result 2. Put snapshots every 1000 steps, total 500 frames. Visualized with Pov-Ray.

  • Movie1 [mpg, 3.3 MB]
  • Movie2 [mpg, 3.3 MB] Same as Movie1 but with a different way of visulalization

    Result 4

    A movie created by my coworker Dr. Inaoka.

  • Movie [avi, 9.5 MB]
  • Movie [mp4, 2.0 MB]
  • Movie [zipped, 8.4 MB]

    Self-avoiding Random Walk

    Not for research, but just for fun!

    Self-avoiding random walk on 200 times 200 square lattice with fixing starting and ending point.


  • Animation Gif [1.8 MB]

    Self-avoiding random walk with an idea of fractal. The size of lattice starts from 4x4 and ends at 128x128.

  • Animation Gif [2.0 MB]

    Reaction-Diffusion Systems

    Not for research, but just for fun!

    FitzHugh-Nagumo system

    Creating maze pattern.

    Maze Pattern [gif, 1.2MB]

    MPEG format

    Gray-Scott system

    Creating labyrinth, self-replicating, etc, depending on parameters.

    Labyrinth [gif, 0.8MB] Self-replicating [gif, 2.5MB]

    Visualized by ParaView.

  • Animation gif [3.8MB]

    Structural Analysis

    Not for research, but just for fun!

    Hito

    A structural analysis of a Chinese character "hito" which means "people". Dynamic and static loads are visualized for a system containing particles and springs under uniform gravity. Red parts denote high internal stresses. 772 particles, 2788 bonds (springs), 20000 steps, and 200 frames.

    Source codes are available at GitHub.

  • Animation Gif

  • Animation Gif
  • Movie File (mp4, 755kb)

    Wo

    A structural analysis of a Japanese character (Hiragana) "wo". Dynamic and static loads are visualized for a system containing particles and springs under uniform gravity. Red parts denote high internal stresses. 11971 particles, 46275 bonds (springs), 20000 steps, and 200 frames.

  • Movie [mpg, 0.7 MB]
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